单项选择题

To assist separation of low viscosity oils steam coils or electric heaters are fitted （） of the oily water separator.

A.in entrance
B.in exit
C.in the upper part
D.on the outside

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单项选择题
The most suitable pump for oily water separator feed duties is （）.

A.a reciprocating pump
B.a vane pump
C.a centrifugal pump
D.a triple screw pump
单项选择题
Placing a filter on the （） of an oily water separator will polish the discharge but overloading must be avoided.

A.suction side
B.discharge side
C.by-pass pipe
D.sampling pipe
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